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-rw-r--r--ldso/include/dl-elf.h2
-rw-r--r--ldso/include/ldso.h2
-rw-r--r--ldso/ldso/bfin/dl-inlines.h41
-rw-r--r--ldso/ldso/bfin/dl-sysdep.h2
-rw-r--r--ldso/ldso/c6x/dl-inlines.h29
-rw-r--r--ldso/ldso/c6x/dl-sysdep.h3
-rw-r--r--ldso/ldso/c6x/elfinterp.c6
-rw-r--r--ldso/ldso/dl-elf.c318
-rw-r--r--ldso/ldso/dl-startup.c16
-rw-r--r--ldso/ldso/frv/dl-inlines.h41
-rw-r--r--ldso/ldso/frv/dl-sysdep.h2
-rw-r--r--ldso/ldso/mips/elfinterp.c5
-rw-r--r--ldso/ldso/x86_64/elfinterp.c8
13 files changed, 301 insertions, 174 deletions
diff --git a/ldso/include/dl-elf.h b/ldso/include/dl-elf.h
index 908cb63ce..495bd2bca 100644
--- a/ldso/include/dl-elf.h
+++ b/ldso/include/dl-elf.h
@@ -222,7 +222,7 @@ unsigned int __dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info
ADJUST_DYN_INFO(DT_DSBT_BASE_IDX, load_off);
/* Initialize loadmap dsbt info. */
- load_off.map->dsbt_table = dynamic_info[DT_DSBT_BASE_IDX];
+ load_off.map->dsbt_table = (void *)dynamic_info[DT_DSBT_BASE_IDX];
load_off.map->dsbt_size = dynamic_info[DT_DSBT_SIZE_IDX];
load_off.map->dsbt_index = dynamic_info[DT_DSBT_INDEX_IDX];
#endif
diff --git a/ldso/include/ldso.h b/ldso/include/ldso.h
index 9aa610e7b..3152b744a 100644
--- a/ldso/include/ldso.h
+++ b/ldso/include/ldso.h
@@ -35,6 +35,8 @@
#include <sys/types.h>
/* Pull in the arch specific page size */
#include <bits/uClibc_page.h>
+/* Pull in the MIN macro */
+#include <sys/param.h>
/* Pull in the ldso syscalls and string functions */
#ifndef __ARCH_HAS_NO_SHARED__
#include <dl-syscall.h>
diff --git a/ldso/ldso/bfin/dl-inlines.h b/ldso/ldso/bfin/dl-inlines.h
index 6524f5edc..969986218 100644
--- a/ldso/ldso/bfin/dl-inlines.h
+++ b/ldso/ldso/bfin/dl-inlines.h
@@ -88,14 +88,39 @@ __dl_init_loadaddr_hdr (struct elf32_fdpic_loadaddr loadaddr, void *addr,
segdata->p_memsz = phdr->p_memsz;
#if defined (__SUPPORT_LD_DEBUG__)
- {
- extern char *_dl_debug;
- extern int _dl_debug_file;
- if (_dl_debug)
- _dl_dprintf(_dl_debug_file, "%i: mapped %x at %x, size %x\n",
- loadaddr.map->nsegs-1,
- segdata->p_vaddr, segdata->addr, segdata->p_memsz);
- }
+ if (_dl_debug)
+ _dl_dprintf(_dl_debug_file, "%i: mapped %x at %x, size %x\n",
+ loadaddr.map->nsegs-1,
+ segdata->p_vaddr, segdata->addr, segdata->p_memsz);
+#endif
+}
+
+/* Replace an existing entry in the load map. */
+static __always_inline void
+__dl_update_loadaddr_hdr (struct elf32_fdpic_loadaddr loadaddr, void *addr,
+ Elf32_Phdr *phdr)
+{
+ struct elf32_fdpic_loadseg *segdata;
+ void *oldaddr;
+ int i;
+
+ for (i = 0; i < loadaddr.map->nsegs; i++)
+ if (loadaddr.map->segs[i].p_vaddr == phdr->p_vaddr
+ && loadaddr.map->segs[i].p_memsz == phdr->p_memsz)
+ break;
+ if (i == loadaddr.map->nsegs)
+ _dl_exit (-1);
+
+ segdata = loadaddr.map->segs + i;
+ oldaddr = (void *)segdata->addr;
+ _dl_munmap (oldaddr, segdata->p_memsz);
+ segdata->addr = (Elf32_Addr) addr;
+
+#if defined (__SUPPORT_LD_DEBUG__)
+ if (_dl_debug)
+ _dl_dprintf(_dl_debug_file, "%i: changed mapping %x at %x (old %x), size %x\n",
+ loadaddr.map->nsegs-1,
+ segdata->p_vaddr, segdata->addr, oldaddr, segdata->p_memsz);
#endif
}
diff --git a/ldso/ldso/bfin/dl-sysdep.h b/ldso/ldso/bfin/dl-sysdep.h
index 50c750990..168e5c89a 100644
--- a/ldso/ldso/bfin/dl-sysdep.h
+++ b/ldso/ldso/bfin/dl-sysdep.h
@@ -120,6 +120,8 @@ struct funcdesc_ht;
#define DL_INIT_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
(__dl_init_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR), \
dl_init_loadaddr_load_count))
+#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
+ (__dl_update_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR)))
#define DL_LOADADDR_UNMAP(LOADADDR, LEN) \
(__dl_loadaddr_unmap ((LOADADDR), (NULL)))
#define DL_LIB_UNMAP(LIB, LEN) \
diff --git a/ldso/ldso/c6x/dl-inlines.h b/ldso/ldso/c6x/dl-inlines.h
index d8fb42c55..62e1cc9ca 100644
--- a/ldso/ldso/c6x/dl-inlines.h
+++ b/ldso/ldso/c6x/dl-inlines.h
@@ -74,6 +74,35 @@ __dl_init_loadaddr_hdr (struct elf32_dsbt_loadaddr loadaddr, void *addr,
#endif
}
+/* Replace an existing entry in the load map. */
+static __always_inline void
+__dl_update_loadaddr_hdr (struct elf32_dsbt_loadaddr loadaddr, void *addr,
+ Elf32_Phdr *phdr)
+{
+ struct elf32_dsbt_loadseg *segdata;
+ void *oldaddr;
+ int i;
+
+ for (i = 0; i < loadaddr.map->nsegs; i++)
+ if (loadaddr.map->segs[i].p_vaddr == phdr->p_vaddr
+ && loadaddr.map->segs[i].p_memsz == phdr->p_memsz)
+ break;
+ if (i == loadaddr.map->nsegs)
+ _dl_exit (-1);
+
+ segdata = loadaddr.map->segs + i;
+ oldaddr = (void *)segdata->addr;
+ _dl_munmap (oldaddr, segdata->p_memsz);
+ segdata->addr = (Elf32_Addr) addr;
+
+#if defined (__SUPPORT_LD_DEBUG__)
+ if (_dl_debug)
+ _dl_dprintf(_dl_debug_file, "%i: changed mapping %x at %x (old %x), size %x\n",
+ loadaddr.map->nsegs-1,
+ segdata->p_vaddr, segdata->addr, oldaddr, segdata->p_memsz);
+#endif
+}
+
static __always_inline void
__dl_loadaddr_unmap (struct elf32_dsbt_loadaddr loadaddr)
{
diff --git a/ldso/ldso/c6x/dl-sysdep.h b/ldso/ldso/c6x/dl-sysdep.h
index 8f1b122d3..ff7accdf1 100644
--- a/ldso/ldso/c6x/dl-sysdep.h
+++ b/ldso/ldso/c6x/dl-sysdep.h
@@ -104,6 +104,9 @@ struct elf32_dsbt_loadaddr;
(__dl_init_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR), \
dl_init_loadaddr_load_count))
+#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
+ (__dl_update_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR)))
+
#define DL_LOADADDR_UNMAP(LOADADDR, LEN) \
(__dl_loadaddr_unmap ((LOADADDR)))
diff --git a/ldso/ldso/c6x/elfinterp.c b/ldso/ldso/c6x/elfinterp.c
index 7c79171ce..f5d3ad41e 100644
--- a/ldso/ldso/c6x/elfinterp.c
+++ b/ldso/ldso/c6x/elfinterp.c
@@ -198,6 +198,10 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
new_val = sym_val;
*reloc_addr = sym_val;
break;
+ case R_C6000_DSBT_INDEX:
+ new_val = (old_val & ~0x007fff00) | ((tpnt->loadaddr.map->dsbt_index & 0x7fff) << 8);
+ *reloc_addr = new_val;
+ break;
case R_C6000_ABS_L16:
new_val = (old_val & ~0x007fff80) | ((sym_val & 0xffff) << 7);
*reloc_addr = new_val;
@@ -224,7 +228,7 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
(char *)symbol_addr,
symtab[symtab_index].st_size);
}
- break;
+ return 0;
default:
return -1; /*call _dl_exit(1) */
}
diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c
index a881b7df7..9e1415b83 100644
--- a/ldso/ldso/dl-elf.c
+++ b/ldso/ldso/dl-elf.c
@@ -314,6 +314,121 @@ goof:
return NULL;
}
+/*
+ * Make a writeable mapping of a segment, regardless of whether PF_W is
+ * set or not.
+ */
+static void *
+map_writeable (int infile, ElfW(Phdr) *ppnt, int piclib, int flags,
+ unsigned long libaddr)
+{
+ int prot_flags = ppnt->p_flags | PF_W;
+ char *status, *retval;
+ char *tryaddr;
+ ssize_t size;
+ unsigned long map_size;
+ char *cpnt;
+ char *piclib2map = NULL;
+
+ if (piclib == 2 &&
+ /* We might be able to avoid this call if memsz doesn't
+ require an additional page, but this would require mmap
+ to always return page-aligned addresses and a whole
+ number of pages allocated. Unfortunately on uClinux
+ may return misaligned addresses and may allocate
+ partial pages, so we may end up doing unnecessary mmap
+ calls.
+
+ This is what we could do if we knew mmap would always
+ return aligned pages:
+
+ ((ppnt->p_vaddr + ppnt->p_filesz + ADDR_ALIGN) &
+ PAGE_ALIGN) < ppnt->p_vaddr + ppnt->p_memsz)
+
+ Instead, we have to do this: */
+ ppnt->p_filesz < ppnt->p_memsz)
+ {
+ piclib2map = (char *)
+ _dl_mmap(0, (ppnt->p_vaddr & ADDR_ALIGN) + ppnt->p_memsz,
+ LXFLAGS(prot_flags), flags | MAP_ANONYMOUS, -1, 0);
+ if (_dl_mmap_check_error(piclib2map))
+ return 0;
+ }
+
+ tryaddr = piclib == 2 ? piclib2map
+ : ((char*) (piclib ? libaddr : 0) +
+ (ppnt->p_vaddr & PAGE_ALIGN));
+
+ size = (ppnt->p_vaddr & ADDR_ALIGN) + ppnt->p_filesz;
+
+ /* For !MMU, mmap to fixed address will fail.
+ So instead of desperately call mmap and fail,
+ we set status to MAP_FAILED to save a call
+ to mmap (). */
+#ifndef __ARCH_USE_MMU__
+ if (piclib2map == 0)
+#endif
+ status = (char *) _dl_mmap
+ (tryaddr, size, LXFLAGS(prot_flags),
+ flags | (piclib2map ? MAP_FIXED : 0),
+ infile, ppnt->p_offset & OFFS_ALIGN);
+#ifndef __ARCH_USE_MMU__
+ else
+ status = MAP_FAILED;
+#endif
+#ifdef _DL_PREAD
+ if (_dl_mmap_check_error(status) && piclib2map
+ && (_DL_PREAD (infile, tryaddr, size,
+ ppnt->p_offset & OFFS_ALIGN) == size))
+ status = tryaddr;
+#endif
+ if (_dl_mmap_check_error(status) || (tryaddr && tryaddr != status))
+ return 0;
+
+ if (piclib2map)
+ retval = piclib2map;
+ else
+ retval = status;
+
+ /* Now we want to allocate and zero-out any data from the end
+ of the region we mapped in from the file (filesz) to the
+ end of the loadable segment (memsz). We may need
+ additional pages for memsz, that we map in below, and we
+ can count on the kernel to zero them out, but we have to
+ zero out stuff in the last page that we mapped in from the
+ file. However, we can't assume to have actually obtained
+ full pages from the kernel, since we didn't ask for them,
+ and uClibc may not give us full pages for small
+ allocations. So only zero out up to memsz or the end of
+ the page, whichever comes first. */
+
+ /* CPNT is the beginning of the memsz portion not backed by
+ filesz. */
+ cpnt = (char *) (status + size);
+
+ /* MAP_SIZE is the address of the
+ beginning of the next page. */
+ map_size = (ppnt->p_vaddr + ppnt->p_filesz
+ + ADDR_ALIGN) & PAGE_ALIGN;
+
+ _dl_memset (cpnt, 0,
+ MIN (map_size
+ - (ppnt->p_vaddr
+ + ppnt->p_filesz),
+ ppnt->p_memsz
+ - ppnt->p_filesz));
+
+ if (map_size < ppnt->p_vaddr + ppnt->p_memsz && !piclib2map) {
+ tryaddr = map_size + (char*)(piclib ? libaddr : 0);
+ status = (char *) _dl_mmap(tryaddr,
+ ppnt->p_vaddr + ppnt->p_memsz - map_size,
+ LXFLAGS(prot_flags),
+ flags | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+ if (_dl_mmap_check_error(status) || tryaddr != status)
+ return NULL;
+ }
+ return retval;
+}
/*
* Read one ELF library into memory, mmap it into the correct locations and
@@ -482,6 +597,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
status = (char *) _dl_mmap((char *) (piclib ? 0 : minvma),
maxvma - minvma, PROT_NONE, flags | MAP_ANONYMOUS, -1, 0);
if (_dl_mmap_check_error(status)) {
+ cant_map:
_dl_dprintf(2, "%s:%i: can't map '%s'\n", _dl_progname, __LINE__, libname);
_dl_internal_error_number = LD_ERROR_MMAP_FAILED;
_dl_close(infile);
@@ -502,8 +618,11 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
char *addr;
addr = DL_MAP_SEGMENT (epnt, ppnt, infile, flags);
- if (addr == NULL)
+ if (addr == NULL) {
+ cant_map1:
+ DL_LOADADDR_UNMAP (lib_loadaddr, maxvma - minvma);
goto cant_map;
+ }
DL_INIT_LOADADDR_HDR (lib_loadaddr, addr, ppnt);
ppnt++;
@@ -518,141 +637,9 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
ssize_t size;
if (ppnt->p_flags & PF_W) {
- unsigned long map_size;
- char *cpnt;
- char *piclib2map = 0;
-
- if (piclib == 2 &&
- /* We might be able to avoid this
- call if memsz doesn't require
- an additional page, but this
- would require mmap to always
- return page-aligned addresses
- and a whole number of pages
- allocated. Unfortunately on
- uClinux may return misaligned
- addresses and may allocate
- partial pages, so we may end up
- doing unnecessary mmap calls.
-
- This is what we could do if we
- knew mmap would always return
- aligned pages:
-
- ((ppnt->p_vaddr + ppnt->p_filesz
- + ADDR_ALIGN)
- & PAGE_ALIGN)
- < ppnt->p_vaddr + ppnt->p_memsz)
-
- Instead, we have to do this: */
- ppnt->p_filesz < ppnt->p_memsz)
- {
- piclib2map = (char *)
- _dl_mmap(0, (ppnt->p_vaddr & ADDR_ALIGN)
- + ppnt->p_memsz,
- LXFLAGS(ppnt->p_flags),
- flags | MAP_ANONYMOUS, -1, 0);
- if (_dl_mmap_check_error(piclib2map))
- goto cant_map;
- DL_INIT_LOADADDR_HDR
- (lib_loadaddr, piclib2map
- + (ppnt->p_vaddr & ADDR_ALIGN), ppnt);
- }
-
- tryaddr = piclib == 2 ? piclib2map
- : ((char*) (piclib ? libaddr : lib_loadaddr) +
- (ppnt->p_vaddr & PAGE_ALIGN));
-
- size = (ppnt->p_vaddr & ADDR_ALIGN)
- + ppnt->p_filesz;
-
- /* For !MMU, mmap to fixed address will fail.
- So instead of desperately call mmap and fail,
- we set status to MAP_FAILED to save a call
- to mmap (). */
-#ifndef __ARCH_USE_MMU__
- if (piclib2map == 0)
-#endif
- status = (char *) _dl_mmap
- (tryaddr, size, LXFLAGS(ppnt->p_flags),
- flags | (piclib2map ? MAP_FIXED : 0),
- infile, ppnt->p_offset & OFFS_ALIGN);
-#ifndef __ARCH_USE_MMU__
- else
- status = MAP_FAILED;
-#endif
-#ifdef _DL_PREAD
- if (_dl_mmap_check_error(status) && piclib2map
- && (_DL_PREAD (infile, tryaddr, size,
- ppnt->p_offset & OFFS_ALIGN)
- == size))
- status = tryaddr;
-#endif
- if (_dl_mmap_check_error(status)
- || (tryaddr && tryaddr != status)) {
- cant_map:
- _dl_dprintf(2, "%s:%i: can't map '%s'\n",
- _dl_progname, __LINE__, libname);
- _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
- DL_LOADADDR_UNMAP (lib_loadaddr, maxvma - minvma);
- _dl_close(infile);
- _dl_munmap(header, _dl_pagesize);
- return NULL;
- }
-
- if (! piclib2map) {
- DL_INIT_LOADADDR_HDR
- (lib_loadaddr, status
- + (ppnt->p_vaddr & ADDR_ALIGN), ppnt);
- }
- /* Now we want to allocate and
- zero-out any data from the end of
- the region we mapped in from the
- file (filesz) to the end of the
- loadable segment (memsz). We may
- need additional pages for memsz,
- that we map in below, and we can
- count on the kernel to zero them
- out, but we have to zero out stuff
- in the last page that we mapped in
- from the file. However, we can't
- assume to have actually obtained
- full pages from the kernel, since
- we didn't ask for them, and uClibc
- may not give us full pages for
- small allocations. So only zero
- out up to memsz or the end of the
- page, whichever comes first. */
-
- /* CPNT is the beginning of the memsz
- portion not backed by filesz. */
- cpnt = (char *) (status + size);
-
- /* MAP_SIZE is the address of the
- beginning of the next page. */
- map_size = (ppnt->p_vaddr + ppnt->p_filesz
- + ADDR_ALIGN) & PAGE_ALIGN;
-
-#ifndef MIN
-# define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
- _dl_memset (cpnt, 0,
- MIN (map_size
- - (ppnt->p_vaddr
- + ppnt->p_filesz),
- ppnt->p_memsz
- - ppnt->p_filesz));
-
- if (map_size < ppnt->p_vaddr + ppnt->p_memsz
- && !piclib2map) {
- tryaddr = map_size + (char*)(piclib ? libaddr : lib_loadaddr);
- status = (char *) _dl_mmap(tryaddr,
- ppnt->p_vaddr + ppnt->p_memsz - map_size,
- LXFLAGS(ppnt->p_flags), flags | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
- if (_dl_mmap_check_error(status)
- || tryaddr != status)
- goto cant_map;
- }
+ status = map_writeable (infile, ppnt, piclib, flags, libaddr);
+ if (status == NULL)
+ goto cant_map1;
} else {
tryaddr = (piclib == 2 ? 0
: (char *) (ppnt->p_vaddr & PAGE_ALIGN)
@@ -665,11 +652,11 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
infile, ppnt->p_offset & OFFS_ALIGN);
if (_dl_mmap_check_error(status)
|| (tryaddr && tryaddr != status))
- goto cant_map;
- DL_INIT_LOADADDR_HDR
- (lib_loadaddr, status
- + (ppnt->p_vaddr & ADDR_ALIGN), ppnt);
+ goto cant_map1;
}
+ DL_INIT_LOADADDR_HDR(lib_loadaddr,
+ status + (ppnt->p_vaddr & ADDR_ALIGN),
+ ppnt);
/* if (libaddr == 0 && piclib) {
libaddr = (unsigned long) status;
@@ -678,7 +665,6 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
}
ppnt++;
}
- _dl_close(infile);
/*
* The dynamic_addr must be take into acount lib_loadaddr value, to note
@@ -700,6 +686,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
_dl_dprintf(2, "%s: '%s' is missing a dynamic section\n",
_dl_progname, libname);
_dl_munmap(header, _dl_pagesize);
+ _dl_close(infile);
return NULL;
}
@@ -715,10 +702,23 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
for (i = 0; i < epnt->e_phnum; i++, ppnt++) {
if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W)) {
+#ifdef __ARCH_USE_MMU__
_dl_mprotect((void *) ((piclib ? libaddr : lib_loadaddr) +
(ppnt->p_vaddr & PAGE_ALIGN)),
(ppnt->p_vaddr & ADDR_ALIGN) + (unsigned long) ppnt->p_filesz,
PROT_READ | PROT_WRITE | PROT_EXEC);
+#else
+ void *new_addr;
+ new_addr = map_writeable (infile, ppnt, piclib, flags, libaddr);
+ if (!new_addr) {
+ _dl_dprintf(_dl_debug_file, "Can't modify %s's text section.",
+ libname);
+ _dl_exit(1);
+ }
+ DL_UPDATE_LOADADDR_HDR(lib_loadaddr,
+ new_addr + (ppnt->p_vaddr & ADDR_ALIGN),
+ ppnt);
+#endif
}
}
#else
@@ -729,6 +729,8 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
#endif
}
+ _dl_close(infile);
+
tpnt = _dl_add_elf_hash_table(libname, lib_loadaddr, dynamic_info,
dynamic_addr, 0);
tpnt->mapaddr = libaddr;
@@ -829,20 +831,44 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
#ifdef __DSBT__
/* Handle DSBT initialization */
{
- struct elf_resolve *t, *ref = NULL;
+ struct elf_resolve *t, *ref;
int idx = tpnt->loadaddr.map->dsbt_index;
unsigned *dsbt = tpnt->loadaddr.map->dsbt_table;
if (idx == 0) {
- /* This DSO has not been assigned an index */
- _dl_dprintf(2, "%s: '%s' is missing a dsbt index assignment!\n",
- _dl_progname, libname);
- _dl_exit(1);
+ if (!dynamic_info[DT_TEXTREL]) {
+ /* This DSO has not been assigned an index. */
+ _dl_dprintf(2, "%s: '%s' is missing a dsbt index assignment!\n",
+ _dl_progname, libname);
+ _dl_exit(1);
+ }
+ /* Find a dsbt table from another module. */
+ ref = NULL;
+ for (t = _dl_loaded_modules; t; t = t->next) {
+ if (ref == NULL && t != tpnt) {
+ ref = t;
+ break;
+ }
+ }
+ idx = tpnt->loadaddr.map->dsbt_size;
+ while (idx-- > 0)
+ if (!ref || ref->loadaddr.map->dsbt_table[idx] == NULL)
+ break;
+ if (idx <= 0) {
+ _dl_dprintf(2, "%s: '%s' caused DSBT table overflow!\n",
+ _dl_progname, libname);
+ _dl_exit(1);
+ }
+ _dl_if_debug_dprint("\n\tfile='%s'; assigned index %d\n",
+ libname, idx);
+ tpnt->loadaddr.map->dsbt_index = idx;
+
}
/*
* Setup dsbt slot for this module in dsbt of all modules.
*/
+ ref = NULL;
for (t = _dl_loaded_modules; t; t = t->next) {
/* find a dsbt table from another module */
if (ref == NULL && t != tpnt) {
diff --git a/ldso/ldso/dl-startup.c b/ldso/ldso/dl-startup.c
index 4799846ee..fa7972d90 100644
--- a/ldso/ldso/dl-startup.c
+++ b/ldso/ldso/dl-startup.c
@@ -32,8 +32,8 @@
/*
* The main trick with this program is that initially, we ourselves are not
- * dynamicly linked. This means that we cannot access any global variables or
- * call any functions. No globals initially, since the Global Offset Table
+ * dynamically linked. This means that we cannot access any global variables
+ * or call any functions. No globals initially, since the Global Offset Table
* (GOT) is initialized by the linker assuming a virtual address of 0, and no
* function calls initially since the Procedure Linkage Table (PLT) is not yet
* initialized.
@@ -55,12 +55,12 @@
*
* Fortunately, the linker itself leaves a few clues lying around, and when the
* kernel starts the image, there are a few further clues. First of all, there
- * is Auxiliary Vector Table information sitting on which is provided to us by
- * the kernel, and which includes information about the load address that the
- * program interpreter was loaded at, the number of sections, the address the
- * application was loaded at and so forth. Here this information is stored in
- * the array auxvt. For details see linux/fs/binfmt_elf.c where it calls
- * NEW_AUX_ENT() a bunch of time....
+ * is Auxiliary Vector Table information sitting on the stack which is provided
+ * to us by the kernel, and which includes information about the address
+ * that the program interpreter was loaded at, the number of sections, the
+ * address the application was loaded at, and so forth. Here this information
+ * is stored in the array auxvt. For details see linux/fs/binfmt_elf.c where
+ * it calls NEW_AUX_ENT() a bunch of times....
*
* Next, we need to find the GOT. On most arches there is a register pointing
* to the GOT, but just in case (and for new ports) I've added some (slow) C
diff --git a/ldso/ldso/frv/dl-inlines.h b/ldso/ldso/frv/dl-inlines.h
index 95233a7c0..0395a7e23 100644
--- a/ldso/ldso/frv/dl-inlines.h
+++ b/ldso/ldso/frv/dl-inlines.h
@@ -72,14 +72,39 @@ __dl_init_loadaddr_hdr (struct elf32_fdpic_loadaddr loadaddr, void *addr,
segdata->p_memsz = phdr->p_memsz;
#if defined (__SUPPORT_LD_DEBUG__)
- {
- extern char *_dl_debug;
- extern int _dl_debug_file;
- if (_dl_debug)
- _dl_dprintf(_dl_debug_file, "%i: mapped %x at %x, size %x\n",
- loadaddr.map->nsegs-1,
- segdata->p_vaddr, segdata->addr, segdata->p_memsz);
- }
+ if (_dl_debug)
+ _dl_dprintf(_dl_debug_file, "%i: mapped %x at %x, size %x\n",
+ loadaddr.map->nsegs-1,
+ segdata->p_vaddr, segdata->addr, segdata->p_memsz);
+#endif
+}
+
+/* Replace an existing entry in the load map. */
+static __always_inline void
+__dl_update_loadaddr_hdr (struct elf32_fdpic_loadaddr loadaddr, void *addr,
+ Elf32_Phdr *phdr)
+{
+ struct elf32_fdpic_loadseg *segdata;
+ void *oldaddr;
+ int i;
+
+ for (i = 0; i < loadaddr.map->nsegs; i++)
+ if (loadaddr.map->segs[i].p_vaddr == phdr->p_vaddr
+ && loadaddr.map->segs[i].p_memsz == phdr->p_memsz)
+ break;
+ if (i == loadaddr.map->nsegs)
+ _dl_exit (-1);
+
+ segdata = loadaddr.map->segs + i;
+ oldaddr = (void *)segdata->addr;
+ _dl_munmap (oldaddr, segdata->p_memsz);
+ segdata->addr = (Elf32_Addr) addr;
+
+#if defined (__SUPPORT_LD_DEBUG__)
+ if (_dl_debug)
+ _dl_dprintf(_dl_debug_file, "%i: changed mapping %x at %x (old %x), size %x\n",
+ loadaddr.map->nsegs-1,
+ segdata->p_vaddr, segdata->addr, oldaddr, segdata->p_memsz);
#endif
}
diff --git a/ldso/ldso/frv/dl-sysdep.h b/ldso/ldso/frv/dl-sysdep.h
index e9c847a69..206a66247 100644
--- a/ldso/ldso/frv/dl-sysdep.h
+++ b/ldso/ldso/frv/dl-sysdep.h
@@ -95,6 +95,8 @@ struct funcdesc_ht;
#define DL_INIT_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
(__dl_init_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR), \
dl_init_loadaddr_load_count))
+#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
+ (__dl_update_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR)))
#define DL_LOADADDR_UNMAP(LOADADDR, LEN) \
(__dl_loadaddr_unmap ((LOADADDR), (NULL)))
#define DL_LIB_UNMAP(LIB, LEN) \
diff --git a/ldso/ldso/mips/elfinterp.c b/ldso/ldso/mips/elfinterp.c
index 3ca403609..159e59d33 100644
--- a/ldso/ldso/mips/elfinterp.c
+++ b/ldso/ldso/mips/elfinterp.c
@@ -381,8 +381,11 @@ void _dl_perform_mips_global_got_relocations(struct elf_resolve *tpnt, int lazy)
*got_entry += (unsigned long) tpnt->loadaddr;
}
else {
+ struct symbol_ref sym_ref;
+ sym_ref.sym = sym;
+ sym_ref.tpnt = NULL;
*got_entry = (unsigned long) _dl_find_hash(strtab +
- sym->st_name, &_dl_loaded_modules->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT, NULL);
+ sym->st_name, &_dl_loaded_modules->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT, &sym_ref);
}
got_entry++;
diff --git a/ldso/ldso/x86_64/elfinterp.c b/ldso/ldso/x86_64/elfinterp.c
index 44e2c66d8..dd9479987 100644
--- a/ldso/ldso/x86_64/elfinterp.c
+++ b/ldso/ldso/x86_64/elfinterp.c
@@ -157,7 +157,9 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope,
int reloc_type;
int symtab_index;
char *symname;
- struct elf_resolve *tls_tpnt = NULL;
+#if defined USE_TLS && USE_TLS
+ struct elf_resolve *tls_tpnt;
+#endif
struct symbol_ref sym_ref;
ElfW(Addr) *reloc_addr;
ElfW(Addr) symbol_addr;
@@ -189,13 +191,17 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope,
if (_dl_trace_prelink)
_dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
&sym_ref, elf_machine_type_class(reloc_type));
+#if defined USE_TLS && USE_TLS
tls_tpnt = sym_ref.tpnt;
+#endif
} else {
/* Relocs against STN_UNDEF are usually treated as using a
* symbol value of zero, and using the module containing the
* reloc itself. */
symbol_addr = sym_ref.sym->st_value;
+#if defined USE_TLS && USE_TLS
tls_tpnt = tpnt;
+#endif
}
#if defined (__SUPPORT_LD_DEBUG__)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 02:02:38 +0000